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| name | mypy |
| description | Python 类型检查，检测类型不匹配/缺失注解/不兼容赋值，PEP 484 参考实现 |
| execution_mode | sandbox |
| metadata | {"language":"python","upstream":{"repo":"https://github.com/python/mypy","stars":19000,"since":2012,"license":"MIT","latest":"1.15.x (2026)","rules":"50+ 错误码","pypi_downloads":"50M+/月","backed_by":"Python 官方（PEP 484 参考实现）","contributors":700,"release_cadence":"月更","integrations":["pip","pre-commit","VSCode","IntelliJ","MegaLinter","reviewdog"]},"rating":{"community":"5/5","rules_richness":"4/5","speed":"3/5","accuracy":"5/5","integration":"4/5","overall":"4.2/5 ⭐⭐⭐⭐"}} |
| 检查范围 | 检查内容 | 错误码示例 |
|---|---|---|
| 类型不匹配 | 函数参数/返回值类型错误 | arg-type, return-value |
| 缺失注解 | 未注解的函数定义 | no-untyped-def |
| 不兼容赋值 | 变量赋值类型不匹配 | assignment |
| 不可达代码 | 类型系统推断出的死代码 | unreachable |
| 导入错误 | 缺失类型存根 | import-untyped |
| None 安全 | Optional 未检查直接使用 | union-attr |
CLI: mypy src/ --no-color --show-error-codes --show-column-numbers
JSON: mypy src/ --output json（mypy >= 1.10）
严格模式: mypy src/ --strict --ignore-missing-imports
现有库: pip install mypy（python/mypy，19K stars）。Python 官方 PEP 484 参考实现。支持 JSON 输出、增量检查、daemon 模式（dmypy）。reviewdog 有 reviewdog/action-mypy 直接桥接。MegaLinter 已内置。